1. Changes in utilization of bariatric surgery in the United States from 1993 to 2016;Campos;Ann. Surg.,2020
2. Open versus closed establishment of pneumoperitoneum in laparoscopic surgery;Bonjer;Br. J. Surg.,1997
3. Primary midline peritoneal access with optical trocar is safe and effective in morbidly obese patients;Sabeti;Surg. Obes. Relat. Dis.,2009
4. Direct laparoscope trocar insertion without prior pneumoperitoneum;Dingfelder;J. Reprod. Med.,1978
5. Creation of pneumoperitoneum using a bladed optical trocar in morbidly obese patients: technique and results;Bernante;Obes. Surg.,2008